CVE-2026-74233 (GCVE-0-2026-74233)
Vulnerability from cvelistv5 – Published: 2026-08-27 10:40 – Updated: 2026-08-27 13:41
VLAI
EPSS
VEX
Title
Zbtlink MQWrt infosrvd Command Injection
Summary
Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 13:41 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| http://vulncheck.com/blog/zbt-darklantern-speakingstone | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/zbtlink-mqwr… | third-party-advisory |
Impacted products
16 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Zbtlink | WE1326 |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE2426-C |
Affected:
19.1112
(custom)
|
guessed | |
| Zbtlink | WE357 |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE5926 |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE5926-EC_QP |
Affected:
20.0516
(custom)
|
guessed | |
| Zbtlink | WE5926-WD |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE826-Q |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE826-T2 |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WE826-WD |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WF3526-P |
Affected:
19.051
(custom)
|
guessed | |
| Zbtlink | WG108 |
Affected:
19.1101
(custom)
|
guessed | |
| Zbtlink | WG3526 |
Affected:
19.1101
(custom)
|
guessed | |
| Unknown | CTN720-W1 |
Affected:
19.1101
(custom)
|
guessed | |
| Unknown | LF-1541 |
Affected:
19.1101
(custom)
|
guessed | |
| Unknown | MT7620N |
Affected:
19.1101
(custom)
|
guessed | |
| Unknown | WRC1 |
Affected:
20.0622
(custom)
|
guessed |
Date Public
2026-08-27 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-74233",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-27T13:41:26.633961Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T13:41:32.924Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "WE1326",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE2426-C",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1112",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE357",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-EC_QP",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "20.0516",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-Q",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-T2",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WF3526-P",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.051",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG108",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG3526",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "CTN720-W1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "LF-1541",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "MT7620N",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WRC1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "20.0622",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jacob Baines of VulnCheck"
}
],
"datePublic": "2026-08-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service\u0027s authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective."
}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-321",
"description": "Use of Hard-coded Cryptographic Key",
"lang": "en",
"type": "CWE"
},
{
"cweId": "CWE-78",
"description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T10:40:11.313Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "VulnCheck Blog",
"tags": [
"technical-description",
"exploit"
],
"url": "http://vulncheck.com/blog/zbt-darklantern-speakingstone"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Zbtlink MQWrt infosrvd Command Injection",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-74233",
"datePublished": "2026-08-27T10:40:11.313Z",
"dateReserved": "2026-08-14T18:01:19.917Z",
"dateUpdated": "2026-08-27T13:41:32.924Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-74233",
"date": "2026-10-14",
"epss": "0.0337",
"percentile": "0.88545"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "WE1326",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE2426-C",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1112",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE357",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-EC_QP",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "20.0516",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-Q",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-T2",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WF3526-P",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.051",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG108",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG3526",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "CTN720-W1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "LF-1541",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "MT7620N",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WRC1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "20.0622",
"versionType": "custom"
}
]
}
],
"source": "disclosure@vulncheck.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service\u0027s authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective."
}
],
"id": "CVE-2026-74233",
"lastModified": "2026-09-24T20:43:32.537",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "disclosure@vulncheck.com",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "disclosure@vulncheck.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-74233",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-27T13:41:26.633961Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-27T13:18:34.137",
"references": [
{
"source": "disclosure@vulncheck.com",
"url": "http://vulncheck.com/blog/zbt-darklantern-speakingstone"
},
{
"source": "disclosure@vulncheck.com",
"url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection"
}
],
"sourceIdentifier": "disclosure@vulncheck.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-78"
},
{
"lang": "en",
"value": "CWE-321"
}
],
"source": "disclosure@vulncheck.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-74233",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-27T13:41:26.633961Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T13:41:28.947Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "WE1326",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE2426-C",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1112",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE357",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-EC_QP",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "20.0516",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE5926-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-Q",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-T2",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WE826-WD",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WF3526-P",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.051",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG108",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WG3526",
"vendor": "Zbtlink",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "CTN720-W1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "LF-1541",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "MT7620N",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "19.1101",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "WRC1",
"vendor": "Unknown",
"versions": [
{
"status": "affected",
"version": "20.0622",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jacob Baines of VulnCheck"
}
],
"datePublic": "2026-08-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service\u0027s authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective."
}
],
"impacts": [
{
"capecId": "CAPEC-88",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-88 OS Command Injection"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-321",
"description": "Use of Hard-coded Cryptographic Key",
"lang": "en",
"type": "CWE"
},
{
"cweId": "CWE-78",
"description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T10:40:11.313Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "VulnCheck Blog",
"tags": [
"technical-description",
"exploit"
],
"url": "http://vulncheck.com/blog/zbt-darklantern-speakingstone"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Zbtlink MQWrt infosrvd Command Injection",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-74233",
"datePublished": "2026-08-27T10:40:11.313Z",
"dateReserved": "2026-08-14T18:01:19.917Z",
"dateUpdated": "2026-08-27T13:41:32.924Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.